The water cycle, also known as the hydrological cycle, is the continuous movement of water on, above, and below the surface of the Earth. The cycle involves several key processes:
1. Evaporation: Water from oceans, lakes, and rivers is heated by the sun and turns into water vapor, rising into the atmosphere.
2. Condensation: The water vapor cools and condenses into tiny droplets, forming clouds.
3. Precipitation: When the water droplets in clouds become too heavy, they fall to Earth as rain, snow, or other forms of precipitation.
4. Infiltration and Runoff: Some of the water infiltrates into the ground and replenishes groundwater supplies, while the rest flows over the surface as runoff, eventually returning to bodies of water.
The water cycle is essential for maintaining the balance of water on Earth and supports all life forms.